One. Vertical through the apex.
7
7 horizontal lines and 10 vertical lines how many rectangles?
8
As many as you want my friend...
4
24
Two
2
2
If the two lines are parallel, then you get 4 pairs of vertical angles. If the two lines are not parallel, then we get 6 pairs of vertical angles.
There are 4 verticle lines in a cube :)